I've seen it in threads here and other forums. Someone will say, "Don't buy that mower from HD or Lowes, etc. The engine on that unit doesn't have the same doohickie that it does if you buy it from a serviceing dealer." Yet the model number of the engine used is the same in both instances. So, did the mower manufacturer specify a modification, or make a mod themselves, to the engine on the unit sold at the box store? If so, why would the manufacturer give it the same model designation? In other words, for example, shouldn't a Honda GCV160 be the same regardless of what brand mower its on or where its sold? Same for B&S and Kohler engines.